基于hd44780的字符液晶驱动，可实现4线与8线连接，用于1602，1604，2004液晶的显示应用，C编写，完整，易于移植，来源于ELM，chaN-Based on the hd44780 the character LCD driver, 4-wire and 8-wire connection for 1602,1604,2004 LCD display applications, C written, complete, easy to transplant, derived from